Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets

Abstract

This study focuses on the potential of permanent magnets as thermoelectric converters. It is found that a SmCo${}_5$-type magnet exhibits the large anomalous Ettingshausen effect (AEE) at room temperature and that its charge-to-heat current conversion coefficient is more than one order of magnitude greater than that of typical ferromagnetic metals. The large AEE is an exclusive feature of the SmCo${}_5$-type magnet among various permanent magnets in practical use, which is independent of the conventional performance of magnets based on static magnetic properties. The experimental results show that the large AEE originates from the intrinsic transverse thermoelectric conductivity of SmCo${}_5$. This finding makes a connection between permanent magnets and thermal energy engineering, providing the basis for creating "thermoelectric permanent magnets."

arXiv comment14 pages, 4 figures, 2 supplemental figures, 1 supplemental table

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Cited by in corpus (28)

• Transverse thermoelectric generation using magnetic materials
• Fermi level tuning and atomic ordering induced giant anomalous Nernst effect in Co2MnAl1-xSix Heusler alloy
• Thermoelectrics: from Longitudinal to Transverse
• Sm-Co-based amorphous alloy films for zero-field operation of transverse thermoelectric generation
• High-temperature dependence of anomalous Ettingshausen effect in SmCo${}_5$-type permanent magnets
• Enhancement of anomalous Nernst effect in Ni/Pt superlattice
• Spintronic thermal management
• Spin-mediated charge-to-heat current conversion phenomena in ferromagnetic binary alloys
• Creation of flexible spin-caloritronic material with giant transverse thermoelectric conversion by nanostructure engineering
• Combinatorial tuning of electronic structure and thermoelectric properties in Co${}_2$MnAl${}_{1-x}$Si${}_x$ Weyl semimetals
• Hybridizing anomalous Nernst effect in artificially tilted multilayer based on magnetic topological material
• Fundamentals and advances in transverse thermoelectrics
• Permanent-magnet-based transverse thermoelectric generator with high fill factor driven by anomalous Nernst effect
• Multifunctional composite magnet realizing record-high transverse thermoelectric generation
• Phenomenological analysis of transverse thermoelectric generation and cooling performance in magnetic/thermoelectric hybrid systems
• Chemical-substitution-driven giant anomalous Hall and Nernst effects in magnetic cubic Heusler compounds
• Anomalous Ettingshausen effect in iron-carbon alloys
• Seebeck-driven transverse thermoelectric generation in on-chip devices
• Direct electrical probing of anomalous Nernst conductivity
• Simultaneous achievement of large anomalous Nernst effect and reduced thermal conductivity in sintered polycrystalline topological Heusler ferromagnets
• Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography
• Giant anomalous Nernst signal in the antiferromagnet YbMnBi2
• High-throughput imaging measurements of thermoelectric figure of merit
• High-throughput development of flexible amorphous materials showing large anomalous Nernst effect via automatic annealing and thermoelectric imaging
• Designing flexible hard magnetic materials for zero-magnetic-field operation of the anomalous Nernst effect
• Spin caloritronics: History and future prospects of experiments
• Anomalous Nernst effect in La0.5Ca0.5Coo3
• Sensor free, self regulating thermal switching via anomalous Ettingshausen effect and spin reorientation in DyCo5